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Budget-capped x402 buyer: delegate USDC in plain words, agent discovers and pays per call.
npx @getmcp/cli add io.github.Kairose-master/402-labRequires Node.js 18+. Community-contributed server. Review source before installing.
BUYER_PRIVATE_KEY0x-prefixed private key of the paying wallet (keep only small amounts)
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"io.github.Kairose-master/402-lab": {
"command": "https://github.com/Kairose-master/handsel-mandate/releases/download/mcp-v0.1.0/402-lab.mcpb",
"env": {
"BUYER_PRIVATE_KEY": "",
"NETWORK": "eip155:84532",
"MANDATE_MAX_USDC": "1",
"CATALOG_URLS": "https://handsel-mandate-demo.vercel.app/product.json"
}
}
}
}